Surfacing-tool.



c. W. THOMPSON.

SURFAOING TOOL.

APPLICATION FILED MAR. 18, 1909.

Patented Dec. 28, 1909.

i STATES PATENT OFFICE.

CHARLES W. THOMPSON, OF BARBE, VERMONT, ASSIGNOR OF ONE-HALF T FRED A. GREABSON, OF BARBIE, VERMONT.

SUBFAGING-TOOL.

Specification of Letters Patent.

944,523. Patented Dec. 28, 1909.

Application filed March 18, 1909. Serial No. 484,136.

To all whom it may concern: 1 head and having webs or jaws as 5, extend- Be it known that I, CHARLES XV. THOMP- ing laterally therefrom and arranged at SON, a citizen of the United States, residing right angles to each other to provide angular at Barre, in the county of Washington and seats to receive the detachable cuts or chisels State of Vermont, have invented certain new as 7, which are preferably made square in and useful Improvements in Surfacingcross section and are provided with the usual Tools; and I do declare the following to be pointed cutting ends as 8, their other ends a full, clear, and exact description of the inbeing flattened to fit squarely against the vention, such as will enable others skilled in bottom of the seats of the head, 2, which the art to which it appertains to make and seats form continuations of the cuts or tools, use the same. 7, and receive the thrust of said tools when This invention relates especially to surfacthe device is in operation, one corner of each ing tools operated by pneumatic power for tool fitting between two of the right anguuse in cutting granite, marble or the like larly arranged webs as 5. but the invention is not limited to such use. A p ra ty o Cut holding and bracing The objectof the invention is to provide a members as O n n detail in Figs. 5 simply constructed and eflicient surfacing and 6 are designed to engage the outer cortool composed of separable members having nets o the tOOlS 0 cu s, 7, a d the head, 2, means for rigidly connecting them together spa i g he jo t between them and bracwithout the use of screws or bolts. 11g hem laterally at this point. These 7 5 With this and other objects in view, the e p f rm the double function of invention consists of certan novel features braces nd Webs being made in the form of of construction, combination and arrangeght iingularly shaped corner clips with ments of parts, as will be more fully 1 their inner faces adapted to fit the square scribed and particularly pointed out in the co ne s of the head, 2, and cuts, 7, and have appended claims. I their inner ends closed as shown at 10, to

In the accon panying drawings Figure 1 01111 llOOkS 01 engaging the shoulders, 3, at is a side elevation partly in section of a surthe base of the head, 2, to hold said memfacing tool constructed in accordance with gainst longitudinal outward movethis invention; Fig. 2 is an end elevation mente O te faces, 1, of these Ineln- 35 taken from the cutting end; Fig. 3 i a v rbers', 9, are thickened gradually toward their tical, transverse section taken on line 33 O e pen endS to form Wedge-like faces for of Fig. 1; Fig. 4: is a perspective view of the engagement by the clamping ring or band head of the shank, detached; Fig. 5 is a pero be described.

1 spective view of one of the wedge members Fit ing over and surrounding the jaws, 5, 9 detached and taken from the inside thereof, the cute, 7, and braces, 9, is a clamping band Fig. 6 is a similar view taken from the op- 0 Co la 12, ShoWn in detail in Fig. 7. This posite side or outer face; and Fig. 7 is a perband is preferably made in the form of a spective view of the clamping band or colruncated hollow pyramid with the larger lar, detached. end thereof arranged outwardly for coop- In the embodiment illustrated, ahandle or eration with the wedge faces of the memshank, 1, is shown preferably composed of hers, 9, to securely lock the cuts or tools, 7, soft steel tempered to insure strength and in operative position when forced firmly which is preferably made cylindrical at its over said members. outer end to fit in the socket of a pneumatic In use the tool is usually held in a vertical machine by which the tool is operated. position pointing downward. The efiect of The tool holding end of the handle is prothe vibratory movement when the tool is vided with an integral head, 2, preferably connected with a pneumatic machine is to made angular in cross section being here force the clamping band farther and farther shown as square with shoulders as 3 formed forward over the wedge-like members, 9, at the corners of the base of said head for and thus constantly tighten the hold of said a purpose to be described. The outer free band on the tools; yet when the tool is disend of this head, 2, is provided with a lonconnected from the operating machine the gitudinally extending integral cut receiving cuts or chisels may be readily removed by member, 4, projecting from the center of the simply forcing the clamping band rearward or by holding said band and striking'on the free end of the shanl.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of'the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

I claim as my invention:

1. A tool holder having an angular head at one end thereof, a longitudinally extending member arranged at the end of said head and having laterally extending webs or flanges arranged at right angles to each other with seats formed therebetween at the inner ends thereof, wedge-like brace members having means for engagement with said head and adapted to engage the tool to be carried thereby, and a clamping band flaring outwardly toward one end and adapted to encircle said wedge members to securely clamp the tool in posltion.

2. In a surfacing tool the combination of a shank having a square head at one end thereof provided with an integral, longitudinally extending centrally disposed member having flanges extending laterally from the sides thereof'with seats formed at their inner ends, cutters mounted on said seats,

wedge members provided with means for engaging said head to prevent longitudinal movement in one direction and adapted to engage said cutters, and a clamping band tapering toward one end and arranged to encircle said wedge members, and cuts, to clamp'the latter in operative positlon.

3. In a surfacing tool the combination of a shank having a square head arranged at one end thereof, said head having shoulders at its inner end, a centrally disposed, longitudinally extending member projecting from the front end of said head and having laterally extending webs arranged at right angles to each other and tapering toward their forward end, with seats formed at their inner ends, a plurality of tools arranged in said seats to form a square, wedge members having right angularly shaped 1nner faces adapted to engage the corners of said tools and provided with means at one end for engaging the shoulders of said head, and a hollow truncated pyramid shaped clamping band adapted to slide over said wedge members and tools to hold the latter in operative position.

In testlmony whereof I have hereunto set my hand in presence of two subscribing w1tnesses.

CHARLES \V. THOMPSON. Witnesses:

EARLE R. DAVIS, J. O. BEOKLEY. 

